Răspuns:
a)5 supra 3 b)5 supra 6 te am ajutat
[tex]a) \frac{10}{21} \times \frac{7}{5} = \frac{70}{105} [/tex]
[tex]b) \frac{39}{28} \div \frac{13}{14} = \frac{3}{2} [/tex]
